Yu. Yupinov

Development of the first phase of the specialized synchrotron radiation source Siberia-1

Abstract The report deals with the results of developing the 450-MeV electron storage ring SIBERIA-1, i.e. the first phase of the specialized synchrotron radiation source of the I.V. Kurchatov Institute of Atomic Energy. The storage ring was designed, manufactured and put into operation by the staff of the Institute of Nuclear Physics of the Siberian Department of the USSR Academy of Sciences in 1983. In 1984 a superconducting “snake” with a 4.3 T field was mounted in the storage ring. In 1984–1985, as part of the process of developing the storage ring a modification of the synchronization system of the linac FAKEL and of the injection system to the storage ring were performed. The beam diagnostics system was developed. The vacuum system of the storage ring and injection channel was up-dated. Regimes for the joint operation of the storage ring and the linac FAKEL were developed at various adjustments of the latter. A current of 180 mA was obtained at the injection energy of 55 MeV and one of 160 mA at 450 MeV. The beam lifetime has so far been limited by scattering on the residual gas in the storage ring chamber and amounts to 3.6 × 10 3 s at 100 mA current and to 1.4 × 10 4 s at 1 mA current. Presently, operations are being carried out at the experimental station of the luminescent VUV-spectroscopy of channel M and at the VUV-spectrometer for the investigation of wide-band dielectrics, including cryocrystals, at channel S.

The SIBERIA dedicated synchrotron radiation source: status report on the storage rings complex at the Kurchatov Institute for Atomic Energy

Abstract This paper reviews the status of the SIBERIA storage rings complex. The parameters of the linac, booster synchrotron and main ring are given. The transfer of the SIBERIA-1 storage ring to its new site is described. The main parameters of the engineering systems for the SIBERIA complex are presented. The assembly of the SIBERIA-2 storage ring is planned to be finished in 1991. The SIBERIA storage rings complex has been constructed at the Kurchatov Institute for Atomic Energy (IAE) and is the first dedicated synchrotron radiation source in the USSR. The facility includes the SIBERIA-1 450 MeV electron storage ring, the SIBERIA-2 2.5 GeV electron storage ring, two electron transport lines EOC-1 and EOC-2, and an 80–100 MeV electron linac which serves as the injector. The general layout of SIBERIA is shown in fig. 1. All accelerators of the SIBERIA facility are designed and manufactured at the Institute of Nuclear Physics (INP) at Novosibirsk.

Acoustic experimental studies of high power modes in accelerating structure of Kurchatov SR source

The acoustic effects in metal constructions of accelerator electrodynamics structures permit to realize non-disturbing methods of determining the electrodynamics characteristics of structures for nominal working conditions (high RF-power level and for real temperature and vacuum distributions, with an intense beam). These effects are registered reliably by acoustic pickups installed on external surfaces of structures.

Development of the system for stabilizing the position of a synchrotron radiation beam

The development of the system for stabilizing the vertical position of the “white” synchrotron radiation beam on the 2.5-GeV SIBERIA-2 storage ring at the Kurchatov Center of Synchrotron Radiation is considered. Two versions of the multichannel stabilizing system that are currently in operation are described. In the first, the procedures executed when introducing the first beam-stabilizing feedback loop in one channel are merely replicated for all other beamlines. In this case, an individual computer transmitting information to the control system of the storage ring via the local-area network is used in each beamline to process information from a beam position sensor equipped with a video camera. The other version of the stabilizing system is based on a central computer with a multichannel input card for video images. In this version, beam position sensors are sequentially interrogated by the computer and results of data processing are transmitted to the control system of the storage ring.

Monitoring the Electron-Orbit Shift and Radiation Beams

A system for performing television monitoring of the position of the synchrotron radiation beam is discussed. The results of measurements of the stability of the beam position in several user channels are presented. It is shown that further work is needed to determine and eliminate the factors causing beam displacement. The results of measurements performed by different methods of the electron-beam dimensions in the accumulator are presented.

Control system of the synchrotron radiation source SIBERIA

Abstract The SIBERIA accelerator complex includes a 80 MeV electron linac, a 450 MeV booster storage ring, a main 2.5 GeV storage ring and two transport lines for electron beams. The SIBERIA control system is based on distributed architecture and uses 24-bit CAMAC-oriented control computers and PCs as operator consoles. The paper describes the timing system, the control of the RF system and magnet power supplies, beam diagnostic and interlock systems, etc. Application software provides the control over beam characteristics, automatic energy ramping and monitoring of the parameters of elements and systems. With the use of the SIBERIA control system the electron beam was accelerated in the linac up to 68 MeV on December 1, 1992, and on December 18, 1992, a circulating beam was generated in the 450 MeV booster ring.

Commissioning of the SIBERIA-2 preinjector and first beam results

The DAW structure linac-the preinjector for the SIBERIA SR complex was commissioned on November 1, 1992 when the 62.5 MeV electron beam is obtained. A 6-m-long high impedance (92 MOhm/m) linac operates at 2.8 GHz. The paper describes the experimental RF characteristics of the linac structure and beam measurements obtained during the commissioning. The results of electron current, energy spectrum, beam profiles and emittance measurements are presented.<<ETX>>